Right-click on Borderlands in your Library window, go down to properties, to the Local Files tab, and click on Verify Integrity of Cache (or whatever it's called.) If it consistently crashes with the runner then you may be missing a file, and this will find it for you. Hope it works.

Right-click on Borderlands in your Library window, go down to properties, to the Local Files tab, and click on Verify Integrity of Cache (or whatever it's called.) If it consistently crashes with the runner then you may be missing a file, and this will find it for you. Hope it works.